Reverse Brayton 사이클과 Claude 사이클 기반 LNG 재액화 공정의 동특성 운전성능 비교

다국어 초록 (Multilingual Abstract)

A dynamic model to simulate LNG reliquefaction process has been developed. The model was applied to two candidate cycles for LNG reliquefaction process, which are Reverse Brayton and Claude cycles. The simulation was intended to simulate the pilot plant under construction for operation of the two cycles and evaluate their feasibility. According to the simulation results, both satisfy control requirements for safe operation of brazed aluminum plate-fin type heat exchangers. In view of energy consumption, the Reverse Brayton cycle is more efficient than the Claude cycle. The latter has an expansion valve in addition to the common facilities sharing with the Reverse Brayton cycle. The expansion valve is a main cause to the efficiency loss. It generates a significant amount of entropy associated with its throttling and increases circulation flow rates of the refrigerant and power consumption caused by its leaking resulting in lowered pressure ratio. It is concluded that the Reverse Brayton cycle is more efficient and simpler in control and construction than the Claude cycle.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 공정 사이클 비교
• 3. 공정제어
• 4. 공정 시뮬레이션
• 5. 시뮬레이션 결과
• 6. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 ALPEMA., "The Standards of the Brazed Aluminium Plate-Fin Heat Exchanger Manufacturers’ Association(ALPEMA), 2nd ed." ALPEMA 2000

2 E.W. Lemmon, "REFPROP(Reference Fluid Thermodynamic and Transport Properties). NIST Standard Database 23, Version 7.1, Physical and Chemical Division; National Institute of Science and Technology"

3 Hamworthy Ltd., "LNG systems for marine application" Hamworthy Brochure 2007

4 M. Küver, "Evaluation of propulsion options for LNG carriers" 2002

5 Y. Shin., "Design of a boil-off natural gas reliquefaction control system for LNG carriers" 86 (86): 37-44, 2009

6 J.W. Moon, "Cryogenic Refrigeration Cycle for Re-Liquefaction of LNG Boil -Off Gas" 2007